Kids Riddles

Question: I have numbers on my face but can't find 13 any place. What am i?

Question: You throw away the outside, eat the inside, and throw away the inside.

Question: I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter.

What am I?

Question: What was the president of the United State's name in 1980?

Question: What occurs once in a minute, twice in a moment and never in one thousand years?